00000nam 2200000za 4500 9.804858 CaOODSP 20221107135519 cr ||||||||||| 150406s1999 oncd ob f000 0 eng d CaOODSP eng eng fre n-cn--- Fs70-1/1999-22E-PDF Schweigert, J. F. An evaluation of the natural mortality rate used in the assessment of British Columbia herring stocks [electronic resource] / J. Schweigert and R. Tanasichuk. Ottawa : Fisheries and Oceans Canada, 1999. 23 p. : fig., graphs, tables. Canadian Stock Assessment Secretariat research document, 1480-4883 ; 99/22 Includes bibliographical references (p. 10). The objectives of this study were to investigate the estimates of natural mortality used in recent Pacific herring assessments with a view to evaluating the impact of variation in this parameter on perceptions of the abundance and trends in stock abundance. The sensitivity of abundance estimates to variation in natural mortality also provides some insight into the significance of failures to meet some of the other assumptions about the natural mortality rate on abundance levels. gccst Fisheries resources gccst Salt water fish gccst Fishing area gccst Fisheries management Tanasichuk, Ronald W. Canada. Department of Fisheries and Oceans. Canada. Canadian Stock Assessment Secretariat. Canadian Stock Assessment Secretariat research document, 1480-4883 ; 99/22 (CaOODSP)9.507740 PDF 820 KB https://publications.gc.ca/collections/collection_2015/mpo-dfo/Fs70-1-1999-22-eng.pdf